Comfrey is my favourite herb! If you suffer from cold sores as I do, simply pulp some stem and hold it on the sore for a couple of minutes, the sore just goes away! The quicker you get it on the quicker the cold sore heals up. So Comfrey is a summer plant but Borage is the next best thing in winter. Aloe Vera is a must for burns! Never without it! I’ve grown and used a lot of herbs in my time! As you say it’s a great liquid fertiliser as is fresh horse of cow poo steeped in water for a couple days. Aged chicken manure is the king of animal fertilisers!